Xenoposeidon proneneukos gen. et sp. nov. is a neosauropod represented by BMNH R2095, a well-preserved partial mid-to-posterior dorsal vertebra from the Berriasian– Valanginian Hastings Beds Group of Ecclesbourne Glen, East Sussex, England. It was briefly described by Lydekker in 1893, but it has subsequently been overlooked. This specimen’s concave cotyle, large lateral pneumatic fossae, compl...

Variations in the carbon isotopic composition of carbonate and organic (?13Ccarb ?13Corg) are generally used to record perturbations global cycle, which turn closely linked changes climate. However, because climate gradients on Earth, assignment “global” signal ancient records is not straightforward. Here, we report ?13C values material Upper Jurassic Lower Cretaceous sedimentary Vaca Muerta Fo...

The fossil biota of the upper Valanginian–lower Hauterivian sediment hosted vent (SHV) environment Zeng?várkony comprises 39 species, 55 genera and higher taxa representing seven phyla. Thirteen these are reported from Zeng?rvárkony as new species or subgenera/genera, this high endemicity is linked to a unique palaeoenvironment. palaeoenvironment developed in an outer shelf epicontinental setti...

Abstract Inversion structures including folds, reverse faults are observed along the Bjørnøyrenna Fault Complex in western Barents Sea, although fault complex is extensional origin and developed mid-Jurassic to Early Cretaceous. Subsidence was interrupted Cretaceous (Valanginian early Barremian) because of syn-rift localized tectonic inversion, itself related uplift Loppa High. The inversion ca...

The main purpose of this study is to estimate hydrocarbon potentialities Yamama Formation (Valanginian–Early Hauterivian) by using assessment technique links up between gamma ray spectrometry logs and other conventional open hole for determining the petrophysical properties units in Subba oil-field oil water contact as well. Lower (YB); considered reservoir unit, aptly composed shallow high dep...

Abstract The Jebel Oust region (north-eastern Tunisia) recorded two levels of marine black shale in the Lower Cretaceous marly series. Geodynamic evolution, biostratigraphic and Rock–Eval analysies allow classifying those shales as unconventional oil resource systems that were deposited during oceanic anoxic events: Middel Barremian Event "MBE" Early Aptian "OAE1a". Paleogeographic evolution hi...

The Cretaceous marine sedimentary record is characterized by time intervals rich in organic matter correlating with positive carbon isotope excursions, often called oceanic anoxic events. Weissert Event corresponds to the first such event during Valanginian stage. associated palaeoenvironmental perturbations, which include increasing surface water primary productivity, are hypothesized have bee...

the berriasian-valanginian fahliyan formation forms one of the giant reservoirs in the subsurface of the abadan plain, onshore iran. a detailed petrographical analysis of the available cores and thin sections revealed that the different diagenetic parameters influenced the reservoir quality of the fahliyan formation in this field. the fahliyan formation has been influenced by three diagenetic e...